How Much Does a Crab Weigh?
A crab weighs about 40 grams (1.4 oz).
That is the USDA average for one crab, which has 33 calories and 7.2 g of protein. Sizes vary, so weigh yours if you track closely.
Crab Calorie Calculator
33cal
in 1 crab (40 g)Protein7.2 g91% of calories
Fat0.3 g9% of calories
Carbs0 g0% of calories
2% of a 2,000 calorie day
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Total
Crab weight by size and measure
| Measure | Grams | Ounces | Calories |
|---|---|---|---|
| 1 crab | 40 g | 1.4 oz | 33 |
| 1 leg of crab | 15 g | 0.5 oz | 12 |
| 1 claw of crab | 15 g | 0.5 oz | 12 |
| 1 cup of crab | 135 g | 4.8 oz | 112 |
Crab calories by serving size
Common amounts of crab with calories and macros. Tap a row for its full nutrition page.
| Serving | Weight | Calories | Protein | Fat | Carbs |
|---|---|---|---|---|---|
| 1 leg | 15 g | 12 | 2.7 g | 0.1 g | 0 g |
| 1 claw | 15 g | 12 | 2.7 g | 0.1 g | 0 g |
| 1 oz | 28 g | 24 | 5.1 g | 0.2 g | 0 g |
| 2 legs | 30 g | 25 | 5.4 g | 0.2 g | 0 g |
| 2 claws | 30 g | 25 | 5.4 g | 0.2 g | 0 g |
| 1 crab | 40 g | 33 | 7.2 g | 0.3 g | 0 g |
| 50g | 50 g | 42 | 8.9 g | 0.4 g | 0 g |
| 1/2 cup | 68 g | 56 | 12 g | 0.5 g | 0 g |
| 2 crab | 80 g | 66 | 14 g | 0.6 g | 0 g |
| 100g | 100 g | 83 | 18 g | 0.7 g | 0 g |
| 4 oz | 113 g | 94 | 20 g | 0.8 g | 0 g |
| 1 cup | 135 g | 112 | 24 g | 1 g | 0 g |
| 200g | 200 g | 166 | 36 g | 1.5 g | 0 g |
Crab vs similar foods
Calories per 100 g compared with other fish and seafood.
Crab: common questions
How much does a crab weigh?
About 40 g, or 1.4 oz.
How many calories are in a crab?
A crab has 33 calories.
More about crab
Amount for a target
Weights and conversions
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Source: USDA FoodData Central, FNDDS 2021-2023. FDC ID 2706344. Original description: Crab. Portion weights are USDA household measures.